Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your CR3 images to PGM format. This tool works for both professionals and casual users. Convert your images to PGM in seconds.
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Canon RAW 3
The modern, efficient raw format for Canon's mirrorless era.
CR3 is the current raw image format used by Canon's EOS R mirrorless cameras and newer DSLRs. Introduced in 2018 with the EOS M50, it completely replaces the older CR2 format. The biggest innovation in CR3 is the introduction of 'C-RAW' (Compact Raw). This is a lossy compression option that reduces file sizes by up to 40% with virtually no visible loss in image quality. This allows photographers to shoot longer bursts, save hard drive space, and transfer files faster without sacrificing the flexibility of raw editing.
Unlike CR2, which was based on TIFF, CR3 is based on the CIFF (Camera Image File Format) structure, which is related to the MP4 container. This modern architecture allows for faster reading/writing and better metadata handling. CR3 files store 14-bit sensor data. In standard mode, it uses lossless compression. In C-RAW mode, it uses a smart lossy algorithm that prioritizes highlight and shadow detail while compressing midtones.
As sensor resolutions jumped from 20MP to 45MP+ (like in the EOS R5), file sizes became unmanageable. CR2 files were getting too big. Canon developed CR3 to solve this storage bottleneck, launching it alongside their push into full-frame mirrorless cameras.
Portable Gray Map
The standard uncompressed grayscale format.
PGM (Portable Gray Map) is the grayscale member of the Netpbm format family. It sits between PBM (1-bit black and white) and PPM (full color). It is designed to store grayscale images where each pixel has a value ranging from black to white, with typical depths of 8-bit (0-255) or 16-bit (0-65535).
Like other Netpbm formats, PGM has two sub-formats: P2 (ASCII) and P5 (Binary). The header defines the dimensions and the maximum gray value (Maxval). In P2, pixel values are written as plain text numbers separated by spaces. In P5, they are raw bytes. It is strictly a single-channel format.
Created by Jef Poskanzer in the late 80s to handle scanned photos that were better than 1-bit bitmaps but didn't need full color. It became a staple in computer vision research and Unix tools.
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